Burglar alarm



l atented May 4, 1926.

warren STATES PATENT: QF CE- FRANCIS ALVIN nE'EoE AND LuoroN-{TELn COVENTRY, or sEpRQTWoOLLEY,

r -WASHINGTO1\T.

BURGLAR' ALARM.

Application filed April 25, 1925. fierial No. 25,921.

Be it known that we, FimNors' ALVIN Rnnon and LuoioN TELL COVENTRY, citizens "of the United States, and residents of SedrolVoolley, in the county of Skagit and State of lVashington, have invented certain new and useful Improvements in Burglar Alarms,

, of which the following is a specification.

Our present invention relates generally to burglar alarms, and more particularly to mechanical cartridge firing apparatus appli cable to doors and windows insuch arrangement that when the door or window is opened, the cartridge will be fired, and our object is the provision for this purpose of a simple inexpensive apparatus which will be positive and unfailing in its action, as well as one which may be mounted and manipulated, so as to avoid effective movement of its parts in case of approach to the door of one who is warranted to enter and properly equipped for that purpose.

In the accompanying drawing which il-' lustrates our present invention and forms a part of this specification,

Figure 1 is a front elevation illustrating the practical application of our invention, Figure 2 is a side view partly broken away .and in section, v r r Figure 3 is a vertical longitudinal section taken centrally through the device with the parts in the actuated position,

Figure a is a horizontal section taken substantially on the line %4 of Figure 1,

Figure 5 is another horizontal section taken substantially on the line 5-5 of Figure 1, Figure 6 is a front elevation showing the parts arranged with an actuating member adapted to be shifted out. of effective position by means of a key, and r Figures 7 and 8 are perspective views respectively of the actuating member shown in Figure 6, and the key for moving said member to inactive position.

Referring now to these figures, our invention" proposes an apparatus in which a bolt 10 is mounted lengthwise of a bracket 11, to shift in the direction of its length and to rotate insaid bracket, the latter having for this purpose spaced portions with guide apertures for the bolt 10, the space between which portions exposes a part of the bolt. In its exposed portion the bolt has an arm fixed therethrough to outstand substantially therefrom at one side as indicated at 12,

the bolt 10 projectsinto atransverse bore 18 the bracket 11 and the opposite end of which and this arm serves as an abutment for one end of an actuatingspring 13'coiledar0und the'bolt and abutting at its opposite end one end 14 of the bracket 11 beyond thelatter of which the adjacent end of the bolt- 10 has an angular extension or arm 15. r

The opposite end of thebol-t 10 within the bracket 11 is formed with an endwise projecting stud 16 constituting a firing pin, and this end of the bolt ismovable in a guide; opening 17 of the bracket'and in its inner position to which it is forced by the' actuating spring 13, the last mentionedend of of the bracket 11 which is preferably squared for the movable reception of a rectangular elongated'cartridge block 19. This cartridge block has a series of openings each adapted to receive therein a cartridge'20, and-the block being shiftablein the bore 18 of the 1 bracket is thus movable to bring the cap carried or flanged end of each cartridge in a-linement with the bolt 10. The cartridge block is moreover provided on its front face with a series of recesses 21, one opposite each of thecartridge receiving apertures,- each of which recesses is adapted for engagement by the angularly bent engaging portion 22 of a spring wire holder 23, one end of which is anchored in the front face of forms a handle whereby this'locking wire may be readily flexed for movement out of 1 any one of the recesses 21 when the cartridge block is shifted to bring a fresh cartridge into firing position,or in other wordsfinto alinement, with the firing bolt 10. v 1

The bracket 11' has extensions 24: and 25- at its opposite ends apertured for the reception of screw fasteners 26, whereby it may be secured toa door or window, and this bracket is further provided with side walls 27 at opposite sidesof the exposed portion of the bolt 10, recessed toform shoulders 28 at opposite sides against which, a laterally 100 projecting latch pin 12 of the firing bolt so spaced therefrom with the free end of the angular extension 15 of the firing bolt slightly overlaps the free edge of the door 30. Thus when the door is opened its free edge will engage the arm 15 and the latter will be swung to a suflicient extent to rotate the bolt 10 and shift its latching arm 12 out of engagement with the shoulder 28, thus releasing the firing bolt for lengthwise movement under actuation of its spring 15 so that its firing pin 16 will engage and explode a cartridge 20 alined at that time with the firing'bolt.

W here the apparatus is used in connection with a window, it is mounted in connection with one of the sashes, for instance, theupper sash so that the end of the section15 will normally overlie the upper edge of the lower sash. Thus when either the upper sash is lowered or the lower sash is raised, actuation of the apparatus to the desired end will take; place. 7

Where the device is desired for use in such manner that its action may be prevented by those entering the door who have a right to do so, it may be mounted as in Figure 6 with the end of the extension 15 of the firing bolt terminating short of the edge of the door casing 31, a keyfcontrolled actuating arm 32 being mounted transversely across that portionof the door 33 adjacent to its free edge, and being normally extended beyond the door edge in line with the bolt extension 15 for actuation of the latter. This arm 22 has its lower edge notched at 34; intermedi ate its ends as shown in Figures 6 and 7 and so positioned as to overlie the key opening 36 ofthe door. Screws or like members 85 and 37 are set into the door through slots 35 and 37 of the arm so as to hold the latter slidable in a horizontal plane. Thus if the door is forced open the cartridge firing ap paratus will be actuated. On the other hand, the entrance of one entitled to enter the door is provided for by virtue of a key 38 as shown in Figure 8, which may be extended through the key opening so that its way the door may be opened without actuating the cartridge firing mechanism.

Our invention presents an apparatus which is thus not only simple and inexpensive considering the results achieved, but one capable of use in connection with doors or win dows and in various positions for warning in the event of burglarious oraniwarranted entry.

We claim 1. In an alarm including a spring actuated firing bolt, and a bracket in which said bolt is controlled and actuated, a cartridge holder having a lengthwise series of cartridge chambers, said bracket having an opening through which the holder is movable to successfully aline its cartridge chambers with the firing bolt, and means on the bracket and cooperating therewith and with the holder to prevent accidental displace ment of the holder when one of its said chambers is alined with the firing bolt.

2. In an alarm including a spring actuated firing bolt, and a bracket in which said bolt is controlled and actuated, a cartridge holder having a lengthwise series of cartri'dge chambers, said bracket having an opening through which the holder is movable to successfully aline its cartridge chambers with the firing bolt, said bracket also having a slot through its wall opposite the holder receiving opening, and said holder having a recess in one face opposite each of its chambers, and a spring retaining member mounted on the bracket and having a portion thereof normally extending through the slot of the bracket and into one of the holder recesses whereby to .support the holder against accidental displacement.

FRANCIS ALVIN REECE. LUCION TELL COVENTRY. 

